Weather Forecast Accuracy Last Month (December)

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Weather Forecast Accuracy Last Year (2025)

Weather Changeability for Seattle, Washington

Average change in

Temperature

Average change in high temperature day-to-day

Last Month:

3.1°

Last Year:

4.0°

Average change in low temperature day-to-day

Last Month:

3.7°

Last Year:

3.9°

Average change in

Precipitation

Chance of dry day after a precip day

Last Month:

26%

Last Year:

43%

Chance of precip day after a dry day

Last Month:

45%

Last Year:

17%

ForecastAdvisor Fact

11.9% of OpenWeather's high temperature forecasts for Seattle were exactly right last year.

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